JP2006192961A - Seat supporting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat supporting structure for a combined harvester and thresher or the like which has a simple constitution, enables the positional adjustment to easily be performed without requiring tools and so forth, and a favorable operability to be obtained even when a driver is a small person or the like, and at the same time, improves the sitting feeling of a seat. <P>SOLUTION: This seat supporting structure supports a seat 21 by a front supporting section 23 and a rear supporting member 33. In this case, the front supporting section 23 freely turnably supports the front section of the seat 21 by a turning shaft 22 on a bonnet 20. The rear supporting section 33 supports the rear section of the seat 21 by a supporting member 34 which is inserted between the seat mounting surface 20a of the bonnet 20 and the seat lower surface 21a. In the seat supporting structure, the seat 21 is made adjustable between a "rear position" and a "front position" in which the height position of the turning shaft 22 is made lower than that of the "rear position". <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a seat support structure for driving suitable for use in a combine.

Conventionally, in a driving seat in a work vehicle such as a combine, the front / rear direction of the seat can be changed by changing the mounting position in the front / rear direction, or by being configured to be slidable in the front / rear direction via a rail or the like. Some have been able to adjust the position. In addition, in Patent Document 1, in view of the fact that such a configuration that can be adjusted only in the front-rear direction is difficult to control in an optimal driving posture according to height and body shape, in addition to position adjustment in the front-rear direction. In the figure, the position adjustment in the vertical direction is made possible.
Japanese Patent No. 3157398

  However, in the structure shown in Patent Document 1, a tool for loosening or tightening a bolt is required when adjusting the position of the seat, and a pedestal that supports the rear portion of the seat is attached to the seat. It is necessary to replace it according to the front height position. For this reason, the work for adjusting the position of the seat is complicated, and it is necessary to prepare a separate member for replacement according to the seat position, so the number of parts increases and the parts are stored. Or a place to store was needed.

  Therefore, the problem to be solved by the present invention is a simple configuration, can be easily adjusted without the need of tools, etc., even when the driver is a small person, etc. And a seat support structure capable of improving the seating comfort of the seat.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, according to the first aspect of the present invention, the front support portion that supports the front portion of the sheet so as to be rotatable about the rotation shaft on the mounting table is interposed between the sheet mounting surface of the mounting table and the lower surface of the sheet. In a sheet support structure in which a sheet is supported by a rear support part that supports the rear part of the sheet by a support member that performs the above operation, the sheet is placed at a "rear position" and a height position of the rotation shaft lower than the "rear position" The “front position” is adjustable.

  According to a second aspect of the present invention, the front support portion includes a seat side bracket having a support piece attached to the lower surface of the seat and supporting the front portion of the seat, and a front upper portion of the mounting table. A mounting table side bracket that forms a lower support surface, and is rotatably supported by the seat side bracket to constitute the rotating shaft and is supported rotatably with respect to the mounting table side bracket. And a rotating arm.

  According to a third aspect of the present invention, a baffle plate is provided on the mounting table to restrict movement from the “rear position” to the “front position” in the seated state by contacting the support piece. .

  As effects of the present invention, the following effects can be obtained.

  In claim 1, by adjusting the seat from the “rear position” to the “front position”, the seat moves forward and tilts forward. Therefore, even when the driver is a small person, the operability is excellent.・ Smoothness can be obtained and seat comfort can be improved.

  According to the second aspect of the present invention, it is possible to change the front and rear direction of the seat and the accompanying inclination of the seat with a simple configuration. Further, since no tool or the like is required for adjusting the position of the sheet, the position of the sheet can be adjusted by a simple operation.

  According to the third aspect of the present invention, the seat in the “rear position” can be prevented from being inadvertently moved to the “front position” due to the inertia of the driver or the seat itself, and the seat can be stably supported. As a result, safety can be improved. In addition, since the baffle plate has a sloped portion that descends to the rear, it is possible to smoothly and reliably adjust the position of the sheet, and to obtain good workability when adjusting the position of the sheet. .

Next, embodiments of the invention will be described with reference to the drawings.
1 is a side view showing a state of “rear position” in the seat support structure of the present invention, FIG. 2 is also a front view, FIG. 3 is a perspective view of the same, and FIG. 4 is a view of “front position” in the seat support structure of the present invention. FIG. 5 is a perspective view showing the state, FIG. 6 is an enlarged side view showing the front support portion, (a) is a view showing a state of “rear position”, and (b) is a view of “front position”. FIG. 7 is a perspective view showing the baffle plate, FIG. 8 is an enlarged partial sectional side view showing the front support portion in the “rear position” state, and FIG. 9 shows the overall configuration of the combine according to the present invention. 10 is a plan view, FIG. 11 is a plan view showing the support structure of the pre-processing mechanism of the cutting unit, FIG. 12 is a plan view showing the slide structure of the pre-processing mechanism of the cutting unit, and FIG. 13 is the pulling device. FIG. 14 is a plan view showing the fixing mechanism of the swing transmission case, and FIG. Diagram illustrating the configuration, FIG 16 is a plan view showing a conventional swinging the transmission case.

  First, the overall structure of a combine to which the seat support structure of the present invention is applied will be described with reference to FIGS. In the combine according to the present invention, a machine body frame 2 is placed on the crawler type traveling device 1, and a cutting portion 3 is disposed at the front end of the machine body frame 2 so as to be movable up and down. A weeding board 4 for weeding cereals protrudes from the front end of the cutting part 3, and a raising case 5 (raising device) is erected at the rear part of the weeding board 4. Then, the tine 6 protrudes from the raising case 5, the cereal is caused by the rotation of the tine 6, and the stock of the cereal is obtained by the cutting blade 7 disposed at the rear portion of the weed plate 4. It is configured to reap. The harvested wheat straw is conveyed backward by the lower conveying device 8a, the upper conveying device 8b, and the vertical conveying device 8c, and the stock is inherited by the feed chain 9 from the upper end of the vertical conveying device 8c and conveyed into the threshing unit 12. Is done. A waste chain 10 is disposed at the rear end of the feed chain 9, and a waste treatment unit 11 including a waste cutter device, a diffusion conveyor, and the like is formed below the rear portion of the waste chain 10. The waste disposal unit 11 cuts the waste into pieces, and then uniformly discharges it to the field while diffusing, or releases it without cutting.

  A sorting unit is disposed below the threshing unit 12, and the sorting unit sorts the grain from grains and sawdust flowing down from the threshing unit 12. It is transported to and stored in a glen tank 13 disposed on the side, and soot and the like are discharged out of the machine. A grain discharge device 15 is configured behind the grain tank 13 and a vertical discharge auger 17 is erected. The glen tank 13 is turnable around the vertical discharge auger 17 so that maintenance of a drive system and a hydraulic system arranged on the inner side of the machine body can be easily performed. A discharge conveyor (not shown) is disposed in the front-rear direction at the bottom of the grain tank 13, and power is transmitted from the discharge conveyor to the grain discharge device 15, thereby being provided in the grain discharge device 15. The grain in the Glen tank 13 can be discharged from the outlet 19 to the outside. The grain discharging device 15 mainly has a lower discharge auger 17 whose lower end communicates with the discharge conveyer and vertically feeds the grains, and a horizontal that communicates with the upper end of the vertical discharge auger 17 and horizontally feeds the grains. The base end side of the horizontal discharge auger 18 is pivotally attached to the upper end of the vertical discharge auger 17 which is composed of the discharge auger 18 and is erected on the rear side of the grain tank 13 so as to be vertically rotatable.

  In addition, a driving unit 14 is configured in front of the Glen tank 13, and in this driving unit 14, a steering handle 16, a traveling speed change lever, a mowing clutch lever, a threshing clutch lever, and the like are disposed, and a bonnet. A sheet 21 is placed and supported on the upper surface of 20. In the present embodiment, the seat 21 is disposed on the hood 20 that houses the engine. However, the seat placement position is not limited to the hood 20.

  Next, the support structure of the seat 21 in the operating unit 14 will be described with reference to FIGS. The seat support structure according to the present invention includes a front support portion 23 that supports the front portion of the sheet 21 so as to be rotatable around a rotation shaft 22 in the left-right direction on the bonnet 20 as a mounting table, and the seat of the bonnet 20. The sheet 21 is supported by a support member 34 interposed between the mounting surface 20 a and the lower surface 21 a of the sheet 21 (hereinafter referred to as “sheet lower surface 21 a”) and a rear support portion 33 that supports the rear portion of the sheet 21. The seat 21 is moved to a “rear position” (see FIGS. 1 to 3 and FIG. 8) and a “front position” (see FIG. 4 and FIG. 4) in which the height position of the rotary shaft 22 is lower than the “rear position”. 5)).

  That is, when the seat 21 is adjusted from the “rear position” to the “front position”, the position of the seat 21 in the front-rear direction moves forward, and the rotation shaft 22 that supports the front portion of the seat 21 moves downward. Will be moved to. Due to the downward movement of the rotation shaft 22, the sheet 21 at the “front position” is inclined forward relative to the sheet 21 at the “rear position”.

  Accordingly, for example, when the driver is a relatively small person such as a woman, the brake pedal disposed below the steering handle 16 in the driving unit 14 in a state where the seat 21 is in the “rear position”. When operating the seat 21 or the like, a feeling of pressure from the front end of the seat 21b of the seat 21 may be felt on the back, but as described above, the seat 21 is moved forward by adjusting the seat 21 to the “front position”. Since it moves forward and tilts forward, the feeling of pressure on the back of the thigh can be eliminated. In addition, the visibility when the driver is seated on the seat 21 is improved. By adjusting the seat 21 from the “rear position” to the “front position”, the seat 21 moves forward and tilts forward, so that even if the driver is a small person, etc., good operability and footing are provided. As a result, the seating comfort of the seat 21 can be improved.

  Hereinafter, the support structure of the sheet 21 will be specifically described with reference to FIGS. As described above, the seat 21 is supported by the front support portion 23 and the rear support portion 33 at two locations in the front-rear direction. First, the front support portion 23 will be described. The front support portion 23 is attached to the seat lower surface 21a and has a seat side bracket 24 having a support piece 24a that supports the front portion of the seat 21, and a lower position than the sheet placement surface 20a fixed to the front upper portion of the bonnet 20 The mounting table side bracket 25 that forms the support surface 25a and the seat side bracket 24 are rotatably supported to form the rotating shaft 22 and are supported rotatably with respect to the mounting table side bracket 25. And a rotating arm 26.

  The seat side bracket 24 is a plate-like member formed by bending both side portions 24b and 24b substantially at right angles to the horizontal portion 24c so as to have a substantially inverted U shape. Fixed to the front of the lower surface 21a. The seat side bracket 24 is fixed to the seat lower surface 21a through the joining members 27 and 27. That is, the joining member 27 is fixed to the outer side surface of the side portion 24b of the seat side bracket 24 and the seat lower surface 21a in a state in which the seat side bracket 24 has a gate shape when viewed from the front. The sheet is bonded to the sheet lower surface 21a at both side portions 24b and 24b. Here, the joining member 27 is fixed to the seat side bracket 24 by bolt fastening using bolts 28 and 28, and to the seat lower surface 21a by welding. However, the fixing method of the joining member 27 is not limited to the present embodiment, and bolt fastening, welding, or the like can be appropriately used for each of the seat side bracket 24 and the seat lower surface 21a. Without using, the seat side bracket 24 can be fixed to the seat lower surface 21a directly by bolt fastening or welding.

  Then, from one side of the horizontal portion 24c which is the rear side with the seat side bracket 24 fixed to the seat lower surface 21a, the support piece 24a is in the same direction as the side portions 24b and 24b with respect to the horizontal portion 24c. It is formed by bending (substantially at right angles). The tip (lower end) of the support piece 24a is in contact with the sheet placement surface 20a. That is, the front portion of the seat 21 is supported by the support piece 24 a formed on the seat side bracket 24. As described above, the state in which the support piece 24a of the seat side bracket 24 abuts on the sheet placement surface 20a and the front portion of the sheet 21 is supported on the sheet placement surface 20a is the "rear position". It will be in the state in.

  In order to make the seat 21 in the “rear position” adjustable to the “front position”, the front support portion 23 is provided with the mounting bracket side bracket 25 and the rotating arm 26. The mounting table side bracket 25 is a plate-like member that is formed in a substantially U shape by bending both side portions 25b and 25b in a substantially right angle direction with respect to the bottom portion 25c, and is similarly U-shaped in a front view. It is fixed to the front upper part of the bonnet 20. The mounting bracket 25 is fixed to the bonnet 20 via both side portions 25b and 25b and the bottom portion 25c. That is, in the side portion 25b, the rear surface is formed so as to abut on the front surface 20b of the bonnet 20, and the extending portion 25d along the sheet placement surface 20a is formed on the upper portion toward the rear. The side portion 25b is formed so as to follow the shape of the front upper corner portion of the bonnet 20 (substantially perpendicular shape in the present embodiment). The extending portion 25d is fixed to the sheet mounting surface 20a by welding or the like, and the welding piece 25e is fixed to the front surface 20b of the bonnet 20 by welding, thereby mounting table side bracket 25. The side portion 25 b is fixed to the bonnet 20. Similarly, the bottom portion 25c is fixed to the front surface 20b of the bonnet 20 by welding via a welding piece 25f formed along the front surface 20b of the bonnet 20. However, the method of fixing the mounting table side bracket 25 to the bonnet 20 is not limited to this embodiment, and bolt fastening or the like can be used as appropriate.

  The support surface 25 a is formed on the bottom 25 c of the mounting table side bracket 25. The support surface 25a is formed on a protrusion 25g that is bent in a gate shape at the bottom 25c. That is, the protrusion 25g is formed so that the support surface 25a corresponds to the support piece 24a of the seat side bracket 24 in front view (so that the width in the left-right direction is substantially the same as the support piece 24a). In the present embodiment, the protrusion 25g that forms the support surface 25a is formed so as to protrude upward, but it may be formed by bending so as to protrude downward. The support surface 25a may be formed without forming 25g (without bending the bottom portion 25c). In this way, the support surface 25 a formed on the mounting table side bracket 25 becomes a support surface in the “front position” state of the seat 21. That is, when the seat 21 is in the “front position”, the lower end of the support piece 24 a of the seat side bracket 24 comes into contact with the support surface 25 a of the mounting table side bracket 25.

  The rotating arm 26 includes a horizontal shaft portion 26 a that forms the rotating shaft 22 in the front portion of the seat 21, and a pivot portion 26 b that is formed by bending both ends and serves as a rotating shaft for the mounting table side bracket 25. -It is formed in a substantially hat shape (substantially gate shape) in front view from 26b. The horizontal shaft portion 26 a of the rotating arm 26 is rotatably supported with respect to the seat side bracket 24 by a support plate 29 fixed to the lower surface of the horizontal portion 24 c of the seat side bracket 24. Specifically, the support plate 29 is formed with a curved portion 29 a that holds the horizontal shaft portion 26 a of the rotating arm 26 between the support plate 29 and the lower surface of the horizontal portion 24 c of the seat side bracket 24. Since the horizontal shaft portion 26a is supported by the curved portion 29a, the rotating arm 26 is rotatably supported with respect to the seat side bracket 24. On the other hand, the pivot portions 26b and 26b of the rotating arm 26 project outward from the inside through the side portion 25b in both side portions 25b and 25b of the mounting table side bracket 25, respectively. 30 is inserted and pivotally supported by the side part 25b.

  That is, the rotation arm 26 forms the rotation shaft 22 of the seat 21 by the horizontal shaft portion 26a, and the rotation shaft (the bonnet 20) of the rotation arm 26 with respect to the mounting base side bracket 25 (bonnet 20) by the pivot portions 26b and 26b. Hereinafter, it is referred to as “the pivot shaft 32” (see FIG. 1). These two rotation axes are perpendicular to the front-rear direction of the seat 21 and are parallel to each other. That is, the rotation arm 26 has two rotation fulcrums separated by a predetermined distance in the same plane, and the axes of the two rotation fulcrums are arranged in parallel in the front-rear direction.

  The pivot shaft 22 is configured to be movable in the front-rear direction by the front support portion 23 configured as described above. Further, in the front support portion 23, the seat side bracket 24 and the mounting table side bracket 25 are configured so as to be substantially symmetrical with respect to the seat 21 in a front view. In the present embodiment, the side portions 24b and 24b of the seat side bracket 24 are configured to be inside the side portions 25b and 25b of the mounting table side bracket 25. The parts 24b and 24b may be configured to be outside the both side parts 25b and 25b of the mounting table side bracket 25.

  As described above, the rear support portion 33 that supports the rear portion of the seat 21 is configured as follows with respect to the front support portion 23 configured to be able to move the rotation shaft 22 of the seat 21 in the front-rear direction. That is, in the rear support portion 33, the sheet 21 is supported by the support member 34 interposed between the sheet placement surface 20a and the sheet lower surface 21a. The support members 34 are arranged substantially symmetrically with respect to the center of the left and right two-point sheets 21 at substantially the same position in the front-rear direction, and are fixed on the sheet placement surface 20a. The support member 34 is formed of an elastic material such as rubber having cushioning properties and is formed in a substantially cylindrical shape, and is configured to absorb an impact on the seat 21. Note that the support member 34 constituting the rear support portion 33 may be fixed to the sheet lower surface 21a on the sheet 21 side, and the shape and the number of disposed members are not limited to the present embodiment. .

  Position adjustment of the sheet 21 in the sheet support structure that supports the sheet 21 by the front support part 23 and the rear support part 33 configured as described above will be described with reference to FIG. When adjusting from the state in which the seat 21 is in the “rear position” (see FIG. 6A) to the “front position” (see FIG. 6B), the seat 21 is lifted and moved forward to support the front. In the portion 23, the seat 21 is rotated around the pivot shaft 32 to a position where the support piece 24 a of the seat side bracket 24 abuts on the support surface 25 a of the mounting table side bracket 25. At this time, the rotating arm 26 is rotated by the horizontal shaft portion 26a and the pivot shaft portions 26b and 26b, respectively, whereby the rotation shaft 22 of the seat 21 is trajected by rotating about the pivot shaft 32. Draw L and move forward and downward.

  In the rear support portion 33, since the support member 34 is fixed to the sheet placement surface 20a, the sheet lower surface 21a at the “rear position” of the sheet 21 is further increased as the sheet 21 moves forward. It comes into contact with the rear portion, and the rear portion of the sheet 21 is supported in this state. In other words, by adjusting the sheet 21 to the “front position”, the rear support portion 33 that supports the rear portion of the sheet 21 by the support member 34 that holds the distance between the sheet lower surface 21 a and the sheet placement surface 20 a substantially constant. Thus, since the pivot shaft 22 in the front support portion 23 moves downward, the seat 21 tilts forward.

  On the contrary, when the seat 21 is adjusted from the “front position” to the “rear position”, as in the case described above, the seat 21 is lifted and moved backward to rotate the turning arm 26 backward. The support shaft 24a of the seat side bracket 24 supporting the front part of the seat 21 by contacting the support surface 25a of the mounting table side bracket 25 by rotating the pivot shaft 22 around the pivot shaft 32. Then, the front part of the sheet 21 is supported on the sheet placement surface 20a.

  By configuring the support structure of the seat 21 as described above, it is possible to change the front-rear direction of the seat 21 and the accompanying inclination of the seat 21 with a simple configuration. Further, since no tool or the like is required for adjusting the position of the seat 21, the position of the seat 21 can be adjusted by a simple operation.

  Further, in the seat support structure that can be adjusted to the “rear position” and the “front position” as described above, the seat 21 in the “rear position” is in the state of the driver or the seat when the combine suddenly stops. To prevent the seat 21 from inadvertently being moved to the “front position” due to the inertia of the seat 21 itself, the seat 21 is brought into contact with the support piece 24a of the seat-side bracket 24 on the bonnet 20 as a mounting table. A baffle plate 35 that restricts movement from the “rear position” to the “front position” in the seated state is provided.

  The seating state of the seat 21 refers to a state in which the driver is seated at the “rear position” and the “front position” of the seat 21. That is, the baffle plate 35 abuts on the support piece 24a of the seat side bracket 24 in a state where the seat 21 is in the “rear position” and moves from the seated state of the seat 21 in the “rear position” to the “front position”. By being present on the track of the support piece 24a, the support state of the seat 21 in the seated state of the seat 21 at the “rear position” is maintained.

  As the configuration of the baffle plate 35, for example, a plate-like member may be erected vertically on the bonnet 20, or a protrusion may be formed on the bonnet 20. From the standpoint of workability at the time, it is preferable to have an inclined surface that descends backward. Specifically, as shown in FIG. 7 and FIG. 8, the baffle plate 35 is configured by a plate-like member that is formed to be bent in a substantially square shape in a side view, and is provided on the bonnet 20. It has the slope part (rear slope part 35a) used as the inclined surface which falls back.

  The baffle plate 35 is located between both side portions 25b and 25b of the mounting table side bracket 25, and the front position of the support piece 24a of the seat side bracket 24 with the seat 21 in the "rear position", that is, the hood 20 At the front upper part, the longitudinal direction is provided so as to be along the left-right direction of the body. The baffle plate 35 is formed in a substantially square shape in a side view as described above by the rear slope portion 35a and the front slope portion 35b, and the baffle plate 35 is fixed to the bonnet 20 on the rear slope portion 35a. The fixed portion 35c is extended rearward. That is, the baffle plate 35 is fixed on the hood 20 by fixing the fixing portion 35 c on the sheet placement surface 20 a of the bonnet 20 by spot welding or the like. However, the fixing method of the baffle plate 35 to the bonnet 20 is not limited to this embodiment, and the fixing portion 35c may be provided on the front slope portion 35b, or the fixing portion 35c may be fixed by bolt fastening or the like. .

  In this way, the support piece 24a of the seat side bracket 24 comes into contact with the baffle plate 35 provided on the bonnet 20 in a state where the seat 21 is in the “rear position”, so that the seat 21 is in the seated state. Movement from “rear position” to “front position” is restricted. That is, in the state where the sheet 21 is in the “rear position”, the support piece 24 a is positioned on the fixing portion 35 c at the rear end portion of the rear inclined surface portion 35 a of the baffle plate 35, so that the support piece 24 a is the baffle plate. 35, the movement from the “rear position” to the “front position” in the seated state of the seat 21 is restricted.

  As described above, when the seat 21 is adjusted to the “front position” from the “rear position” state in which the movement to the “front position” in the seated state of the seat 21 is restricted by the baffle plate 35, as described above. When the lift 21 is moved forward, the seat 21 is lifted and rotated about the rotation shaft 22 so that the support piece 24a of the seat side bracket 24 gets over the baffle plate 35. The seat 21 is moved to the front side so as to rotate about the pivot shaft 32. At this time, since the rear portion of the baffle plate 35 is constituted by a rear slope portion 35a which is a slope descending rearward, the support piece 24a can be adjusted smoothly without being caught by the baffle plate 35.

  Further, when the seat 21 is adjusted from the “front position” to the “rear position”, the rear slope portion 35a of the baffle plate 35 plays a guiding role, and the position of the support piece 24a is the position of the baffle plate 35. When moved to a position behind the front slope 35b, the support piece 24a moves along the rear slope 35a so that the seat 21 moves rearward, and the seat 21 is positioned and "rear position" Set to the state of Thereby, the position of the seat 21 can be adjusted smoothly and reliably.

  The baffle plate 35 can also be provided by forming directly on the bonnet 20 by projecting or bulging the sheet placement surface 20a of the bonnet 20 upward. 1 to 5, the baffle plate 35 is not shown for convenience of explanation.

  In this way, by providing the baffle plate 35 on the bonnet 20 on which the seat 21 is placed, the seat 21 in the “rear position” can be used by the driver or the seat 21 itself when the combine suddenly stops. Thus, it is possible to prevent the seat 21 from being inadvertently moved to the “front position” due to inertia, and the like, thereby enabling stable support of the seat 21 and improving safety. In addition, since the baffle plate 35 has a rear slope portion 35a that is a slope portion that descends rearward, the position of the seat 21 can be adjusted smoothly and reliably, and the position of the seat 21 can be adjusted. Good workability can be obtained.

  By the way, the said cutting part 3 in a combine is connected by the four-bar link so that a left-right slide is possible. The cutting unit 3 will be described with reference to FIGS. In front of the harvesting unit 3, a pre-processing mechanism is configured to scrape and harvest the unharvested cereal meal into the harvesting unit 3 and convey it to the conveying devices 8a, 8b, and 8c. This pretreatment mechanism is composed of the weed plate 4, the pulling case 5 and the cutting blade 7, the scraping belt 40, the scraping wheel 41, etc. 42 is integrally supported. The lateral transmission case 42 has left and right slide arms 44L and 44R that constitute a four-joint link interposed at both right and left ends immediately before a lateral support rod 43 disposed substantially parallel to the lateral transmission case 42. It is connected to be slidable from side to side.

  Further, at the rearmost part of the cutting part 3, power from an engine (not shown) that has a cutting input pulley 54 a at the right end and is mounted on the right side of the front part of the body frame 2 is transmitted via the transmission case 49 and the like. A cutting input case 45 on which the cutting input shaft 54 is pivotally supported is provided horizontally. From the midway part of the cutting input case 45, a vertical support rod 46 is projected forward, and the horizontal support rod 43 is fixed to the tip of the vertical support rod 46. That is, the horizontal transmission case 42 and the pre-processing mechanism are integrally slid left and right with respect to the vertical support rod 46 fixed to the cutting input case 45 and the horizontal support rod 43 fixed to the vertical support rod 46. It is supported by.

  The slide arms 44L and 44R are pivotally supported by the left and right ends of the lateral support rod 43 so that the rear ends of the slide arms 44L and 44R can be rotated left and right, and the front ends thereof are fixed to the left and right ends of the lateral transmission case 42. It is pivotally supported by 47R. Two right and left locking holes 44a and 44b are formed at the tip of the right slide arm 44R, and the lower end of the slide operation lever 48 is inserted into the right link bracket 47R. A fitting hole 47a is formed. Then, the slide operation lever 48 is fitted into one of the locking holes 44a and 44b through the insertion hole 47a, so that the slide arms 44L and 44R are fixed at the left and right positions. That is, when the slide operation lever 48 is lifted upward, the lower end portion of the slide operation lever 48 is removed from either of the locking holes 44a and 44b, and in this state, the slide operation lever 48 is rotated left and right. Then, the pre-processing mechanism is configured to move left and right. The number of the locking holes 44a and 44b may be three or more, and the number of the locking holes is the number of positions where the pretreatment mechanism in the cutting unit 3 is fixed.

  In such a configuration, when the slide operation lever 48 is operated with respect to the preprocessing mechanism fixed to the left and right side, the fixing of the slide arms 44L and 44R constituting the four-bar link is released and the preprocessing mechanism Is moved, and the pre-processing mechanism is fixed by fixing the slide operation lever 48 in a state where the pre-processing mechanism has reached the fixed position on the other side.

  In the pre-processing mechanism configured in this way, as shown in FIG. 12, the rear end of the swing transmission case 50 provided substantially in the front-rear direction in plan view is pivotally supported at the middle upper end of the cutting input case 45. Yes. The swing transmission case 50 is rotatable left and right with a pivotal support to the cutting input case 45 as a fulcrum. The swing transmission case 50 has a sliding receiving case 51 formed in the middle thereof, and a front sliding case 52 is projected forward from the sliding receiving case 51. The rear part is pivotally supported in the sliding receiving case 51 so as to be slidable. Further, in the front sliding case 52, the front portion is pivotally supported so that the swing transmission shaft 53 does not slide back and forth. The rear portion of the swing transmission shaft 53 protrudes rearward from the front sliding case 52, and the protruding portion is pivotally supported in the swing transmission case 50 so as to slide forward and backward. The rear end portion of the swing transmission shaft 53 is engaged with a cutting input shaft 54 pivotally supported in the cutting input case 45 via a bevel gear, and the swing transmission shaft 53 is provided at the rear portion thereof. It is slidably fitted to the bevel gear. Thereby, even when the swinging transmission shaft 53 slides, the bevel gear meshing between the swinging transmission shaft 53 and the cutting input shaft 54 is maintained.

  On the other hand, a lateral transmission shaft 55 is pivotally supported in the lateral transmission case 42 that supports the pretreatment mechanism, and the moving chain of the left raising case 5 is provided at the left end of the lateral transmission shaft 55 in the direction of the vehicle body. A left pulling transmission shaft 57 that drives 56L meshes with the lateral transmission shaft 55 via a bevel gear, and is left pivoted and supported by a transmission case 58 so as to project upward. The upper end of the left raising transmission shaft 57 projectingly engages with the upper sprocket shaft 59L of the left raising case 5 via a bevel gear. Further, the right end portion of the horizontal transmission shaft 55 in the vehicle body traveling direction is a lower right portion that is pivotally supported in a lower right transmission case 61 that hangs downward from a transmission case 60 provided in the vicinity of the vertical center of the right end of the cutting portion 3. The lower end of the transmission shaft 62 meshes with the bevel gear. The upper end of the lower right transmission shaft 62 is interlocked with the upper right transmission shaft 64 pivotally supported in the upper right transmission case 63 in the transmission case 60 by gear meshing or chain transmission. The power of 64 is transmitted to the lower right transmission shaft 62. The upper end of the upper right transmission shaft 64 meshes with the upper sprocket shaft 59R in the right raising case 5 via a bevel gear.

  A bevel gear case 65, which is an input case for the preprocessing mechanism, is fixed to the front end of the front sliding case 52. The bevel gear case 65 is rotatable in the middle of the upper right transmission case 63. It is fitted. In the upper right transmission case 63, a swing transmission shaft 53 protruding forward from the front sliding case 52 is inserted, and the swing transmission shaft 53 transmits power to the upper right transmission shaft 64 via a bevel gear. It has come to be.

  That is, the driving force of the cutting input shaft 54 drives the upper right transmission shaft 64 via the swinging transmission shaft 53 and directly drives the right raising case 5 erecting chain 56R, while the upper right upper portion. It is transmitted from the transmission shaft 64 to the lower right transmission shaft 62 via the transmission case 60 to drive the lateral transmission shaft 55 and further to the left to drive the left raising case 5 and the chain 56L of the raising case 5 via the transmission shaft 57. is doing.

  In the drive system of the pre-processing mechanism configured as described above, the left pulling transmission case 58, the transmission case 60, the lower right transmission case 61, and the upper right transmission case 63 are fixed to the lateral transmission case 42. As the preprocessing mechanism slides in the left-right direction, it slides integrally. At this time, the swing transmission case 50 also rotates left and right, but the swing transmission case 50 has a longer front and rear length than the left and right slide arms 44L and 44R constituting the four-bar link. The amount of displacement needs to be the same as that of the left and right slide arms 44L and 44R. Therefore, when sliding to the left, as described above, the front sliding case 52 and the swinging transmission shaft 53 are configured to be slidable so as to slide forward with respect to the swinging transmission case 50. The configuration is such that the left and right slides of the preprocessing mechanism of the unit 3 can be followed.

  As described above, in the oscillating transmission case 50 configured to be slidable and the cutting unit 3 configured to be slidable left and right by the above-described four-bar linkage, the front case 5 configured to be a heavy object is used. There is a case where a phenomenon occurs in which the processing mechanism bends in the direction of drooping forward due to its own weight (hereinafter referred to as “front drooping”).

  In order to prevent forward drooping in the cutting portion 3, conventionally, a compression spring 171 as an elastic member has been used as shown in FIG. That is, the sliding rod 172 having the compression spring 171 is disposed in parallel with the swing transmission case 50 and fixed to the bevel gear case 65 that moves in the front-rear direction with respect to the swing transmission case 50. The compression spring 171 constitutes a stopper, and the front drooping is elastically prevented in a state where the pretreatment mechanism of the cutting unit 3 is fixed to the left and right sides.

  Specifically, a compression spring 171 is externally fitted to the rear portion of the sliding rod 172, the rear end portion of the compression spring 171 is fixed to the sliding rod 172, and the front end portion is elastically deformed by the compression spring 171. Is configured to be slidable. Further, the front end portion of the sliding rod 172 is fixed to the bevel gear case 65. The middle portion of the sliding rod 172 is supported so as to be slidable by a support portion 173 fixed to the outside of the sliding receiving case 51 formed in the swing transmission case 50.

  In such a configuration, in a state where the pretreatment mechanism of the cutting unit 3 is fixed on the left and right sides, the sliding bar 172 is positioned forward and the front end of the compression spring 171 is in contact with the support unit 173. Become. That is, the compression spring 171 in contact with the support portion 173 restricts the movement of the bevel gear case 65 (sliding of the swing transmission shaft 53 and the front sliding case 52), and elastically prevents the front drooping at the cutting portion 3 from occurring. It had been.

  However, in such a configuration using the compression spring 171, the forward drooping can be prevented only on the left and right sides, so that the cutting unit 3 vibrates with the vibration of the combine body and is fixed to the left and right sides. The position of the pre-processing mechanism is not stable, and the transporting device (upper transporting device 8b and vertical transporting device 8c (see FIG. 9)) that transports the pre-processing mechanism of the mowing unit 3 and the cereal that is harvested by the mowing unit 3. ) Has changed, and there has been a problem in terms of certainty of cereal conveyance in the conveyance device.

  Therefore, in this configuration, in order to prevent forward drooping in the cutting unit 3 and to enable stable and reliable conveyance in the conveyance device, the swing transmission case 50 is interlocked with the four-bar link as shown in FIG. A fixing mechanism 70 is provided. The fixing mechanism 70 has a locking piece 71 projecting outside the swing transmission case 50 and a locking recess 72 a that engages with the locking piece 71. The locking plate 72 is provided so as to be rotatable in the direction in which the engagement is released, and the rotation spring 73 biases the locking plate 72 in the direction in which the locking piece 71 and the locking recess 72a are engaged. is doing.

  The locking piece 71 protrudes toward the side where the locking plate 72 is provided (the right side in the present embodiment) outside the swing transmission case 50. That is, the locking piece 71 is configured to prevent the swinging transmission case 50 from moving in the sliding direction due to the sliding of the front sliding case 52 and the swinging transmission shaft 53 accompanying the left and right slide of the cutting unit 3. Provided. For this reason, the locking piece 71 may be provided in the sliding receiving case 51.

  The locking plate 72 has a locking recess 72 a at its rear part, and the locking recess 72 a is a locking piece in a state where the locking plate 72 is parallel to the swing transmission case 50. 71 is formed to engage. The locking plate 72 is urged by the rotating spring 73 attached to the bevel gear case 65, and the front end portion of the locking plate 72 is rotatably supported. For example, a torsion spring or the like is used as the rotation spring 73, and the locking plate 72 is rotatably supported by the bevel gear case 65 at the front end portion of the rotation spring 73 and is engaged with the locking recess 72 a of the locking plate 72. The locking plate 72 is urged so as to rotate in the direction in which the stop piece 71 is engaged.

  That is, the locking plate 72 fixed to the bevel gear case 65 swings the bevel gear case 65 as the cutting part 3 slides left and right in a state where the engagement between the locking piece 71 and the locking recess 72a is released. When the bevel gear case 65 moves with the movement of the transmission case 50 and the bevel gear case 65 is moved, the locking piece 71 and the locking recess 72a are engaged with each other. Restrict movement. For this reason, the locking recess 72a formed in the locking plate 72 can be engaged with the locking piece 71 corresponding to at least the fixed position (two positions on the left and right in the present embodiment) of the pretreatment mechanism of the cutting unit 3. It is provided as follows. That is, when the pretreatment mechanism is configured to be fixed at three or more positions, the locking recess 72a is provided so as to be able to engage with the locking piece 71 at each fixed position. Note that the shapes of the locking piece 71 and the locking recess 72a are not limited to those shown in the drawing, and the movement of the bevel gear case 65 with respect to the swinging transmission case 50 is restricted to prevent forward drooping in the cutting portion 3. What is necessary is just to be able to engage with sufficient strength. For example, a configuration in which the locking piece 71 is formed in a cylindrical shape, the locking recess 72a is also formed in a cylindrical hole, and the locking piece 71 is inserted into the locking recess 72a is conceivable.

  Further, the engagement between the locking piece 71 and the locking recess 72a and the release thereof are interlocked with the operation of the slide operation lever 48 for operating the left and right slide of the cutting unit 3. That is, as described above, the pre-processing mechanism in the cutting unit 3 is released from the fixed state when the slide operation lever 48 is lifted upward and rotated left and right from the fixed state on the left and right sides. Although it is slid left and right, the engagement between the locking piece 71 and the locking recess 72a is released via a transmission mechanism (not shown) by performing a lifting operation or turning operation of the slide operation lever 48. The locking plate 72 is configured to rotate. That is, by holding the slide operation lever 48 to release the pre-processing mechanism and sliding it to the left and right, the locking plate 72 is simultaneously rotated and locked in the direction of the arrow b via the transmission mechanism. The engagement between the piece 71 and the locking recess 72a is released.

  Then, after the pretreatment mechanism is slid, when the grip of the slide operation lever 48 is released, the locking plate 72 is automatically rotated in the direction of the arrow a by the urging force of the rotating spring 73, and the locking is performed. The piece 71 and the locking recess 72a are engaged, and the fixing mechanism 70 is locked. Here, the rotating spring 73 urges the locking plate 72 in a direction in which the locking piece 71 and the locking recess 72a are engaged with each other, thereby causing the locking piece 71 and the locking recess to move due to vibration of the airframe. It also serves to prevent the engagement with 72a from being inadvertently released.

  Thus, by providing the fixing mechanism 70 in the swing transmission case 50, it is possible to prevent the drooping portion 3 from being drooped in a state where the pretreatment mechanism is fixed, and the compression spring 171 is used as in the conventional case. The vibration (backlash in the front-rear direction) of the pre-processing mechanism that has occurred in the existing configuration can be prevented, so that the position of the pre-processing mechanism of the cutting unit 3 is stabilized, and the relative position between the pre-processing mechanism and the transport device changes. Therefore, it is possible to improve the certainty of cereal conveyance in the conveyance device.

  Further, the fixing mechanism in the swing transmission case 50 can be configured as follows. As shown in FIG. 15, the fixing mechanism 80 in this configuration includes a locking hole 81 (81 a and 81 b) formed in the front sliding case 52 and a locking pin 82 that engages with the locking hole 81. And a slide lock 83. The locking hole 81 is provided at least corresponding to the fixed position of the pretreatment mechanism of the cutting unit 3. That is, in the pre-processing mechanism that is fixed at the left and right positions as in the present embodiment, the amount of forward displacement of the bevel gear case 65 is more fixed in the left side than in the right side in the aircraft traveling direction. When the pretreatment mechanism is fixed on the right side, the locking pin 82 engages with the locking hole 81b (see FIG. 15 (a)). The locking pin 82 engages with a locking hole 81a formed behind the locking hole 81b (see FIG. 5B). The number of the locking holes 81 may be three or more. When the pretreatment mechanism is fixed at three or more positions, it can be engaged with the locking pin 82 at each fixed position. Provided.

  The slide lock 83 is fixed to the outside of the slide receiving case 51 and is inserted into the case body 84 communicating with the inside of the slide receiving case 51. The locking pin 82 is connected to the front sliding case 52 and the swing transmission. The shaft 53 is slidable in a direction perpendicular to the sliding direction of the shaft 53. Further, the locking pin 82 is urged by an elastic member 85 such as a spring in a direction in which the locking pin 82 engages with the locking hole 81 (inward direction of the sliding receiving case 51).

  Further, the locking pin 82 in the slide lock 83 is interlocked with the operation of the slide operation lever 48 in the same manner as the locking plate 72 in the fixing mechanism 70 described above. That is, by holding the slide operation lever 48 and releasing the pre-processing mechanism of the cutting unit 3 to slide left and right, the locking pin 82 is moved between the locking pin 82 and the locking hole 81 at the same time. It slides in the direction in which the engagement is released (the outer direction of the sliding receiving case 51), and the engagement between the locking pin 82 and the locking hole 81 is released. For this reason, the locking pin 82 and the slide operation lever 48 are configured to be linked and linked by a coupling member 86 such as a wire or a rod.

  Then, after sliding the pretreatment mechanism of the cutting unit 3, when the grip of the slide operation lever 48 is released, the locking pin 82 is automatically moved inward of the slide receiving case 51 by the urging force of the elastic member 85. The locking pin 82 and the locking hole 81 are engaged with each other, and the fixing mechanism 80 is locked. Here, the elastic member 85 urges the locking pin 82 in a direction in which the locking hole 81 and the locking pin 82 are engaged, so that the locking hole 81 and the locking pin are caused by vibration of the airframe or the like. It also serves to prevent inadvertent release of engagement with 82.

  In the fixing mechanism 80 having such a configuration, the swaying transmission case 50 can be reduced in weight in addition to the effects of the fixing mechanism 70 described above, so that the cutting portion 3 can be reduced in weight, and forward drooping in the cutting portion 3 can be prevented. The effect can be improved.

  Moreover, in the cutting part 3, as shown in FIG. 13, the front gate (raising gate) 90 on the arch constructed between right and left raising cases 5 and 5 is attached to the upper end portion of the raising case 5 It has been. The front gate 90 is formed hollow by blow molding polyethylene resin or the like. Then, the space formed in the front gate 90 is raised, and the lubricating oil supplied to the lubricated parts in the combine such as the upper sprocket shafts 59L and 59R and the raised chains 56L and 56R in the raising case 5 is lubricated. Used as a tank.

  In other words, conventionally, in the harvesting part of the combine, a front gate is installed at the upper end of the plurality of raising cases for the purpose of improving the rigidity between the plurality of raising cases and improving the design. Although the technology is publicly known, in this configuration, the front gate is used as a tank of lubricating oil supplied to each part of the combine and lubricated.

  The front gate 90 as the oil tank is detachably attached to the pulling case 5. Therefore, the replenishment of the lubricating oil into the front gate 90 can be performed by pulling up the front gate 90 and removing it from the case 5 in addition to the case where the lubricating oil is replenished while being attached to the case 5. Thereby, the workability | operativity at the time of replenishing lubricating oil can be aimed at. Here, various methods are conceivable as a method for fixing the front gate 90 to the pulling case 5. For example, a method using bolt fastening, a method using a pivot pin, a method using a magnet, or the like. Is used as appropriate.

  Then, an oil supply pump 91 for sucking up lubricating oil from the front gate 90 and supplying it to each part of the cutting unit 3 is provided in the vicinity of the front gate 90, specifically, as shown in FIG. Attached to the side of the. Lubricating oil stored in the front gate 90 is sucked up by the oil supply pump 91 through the pipe 92 communicating with the inside of the front gate 90 and supplied to each part of the combine through the supply pipe 93. Here, as an installation place of the oil pump 91, various places can be considered in consideration of operability in a portion that does not interfere with the harvested cereal meal.

  Thus, by using the front gate 90 installed on the upper end portion of the raising case 5 as a lubricating oil tank, the front gate and the lubricating oil attached for the purpose of improving the rigidity of the raising case 5 are used. Since it can also serve as a tank, it is not necessary to provide a separate lubricating oil tank, and the number of parts in the combine can be reduced and the space can be effectively utilized. Further, since it becomes easy to provide an oil pump 91 that sucks the lubricant from the front gate 90 serving as a lubricant tank in the vicinity of the front gate 90, a pipe 92 that connects the lubricant tank and the oil pump 91. Can be simplified. Further, since the front gate 90 attached to the upper end portion of the raising case 5 enters the field of view while the driver is seated on the seat 21 and working in the driving unit 14, the front gate 90 is When molding, the remaining amount of lubricating oil in the front gate 90 can be made visible by making the resin material a light color close to natural, or adjusting the wall thickness, etc. Can be easily grasped, and the burden of monitoring the remaining amount of lubricant by the driver can be reduced.

The side view which shows the state of the "rear position" in the sheet | seat support structure of this invention. Similarly front view. Similarly perspective view. The side view which shows the state of the "front position" in the sheet | seat support structure of this invention. Similarly perspective view. The enlarged side view which shows a front support part. (A) is a figure showing the state of "rear position". FIG. 6B is a diagram illustrating a state of “front position”. The perspective view which shows a baffle plate. The expanded partial cross section side view which shows the front support part in the state of "rear position." The side view which shows the whole structure of the combine which concerns on this invention. FIG. The top view which shows the support structure of the pre-processing mechanism of a cutting part. The top view which shows the slide structure of the pre-processing mechanism of a cutting part. The front view which shows the drive system of a raising apparatus. The top view which shows the fixing mechanism of a rocking transmission case. The figure which similarly shows another structure. The top view which shows the conventional rocking transmission case.

Explanation of symbols

DESCRIPTION OF SYMBOLS 20 Bonnet 20a Sheet mounting surface 21 Sheet 21a Sheet lower surface 22 Rotating shaft 23 Front support portion 24 Seat side bracket 24a Support piece 25 Mounting table side bracket 25a Support surface 26 Rotating arm 26a Horizontal shaft portion 26b Axis portion 32 Pivot shaft 33 Rear support part 34 Support member 35 Baffle plate

Claims (3)

On the mounting table, the rear part of the sheet is supported by a front support part that supports the front part of the sheet so as to be rotatable on a rotation shaft, and a support member interposed between the sheet mounting surface of the mounting table and the lower surface of the sheet. In the sheet support structure that supports the sheet by the rear support part to support,
A seat support structure characterized in that the seat is adjustable between a "rear position" and a "front position" in which the height position of the pivot shaft is lower than the "rear position".   The front support part is a seat side bracket having a support piece attached to the lower surface of the sheet and supporting the front part of the sheet, and a support fixed to the front upper part of the mounting table and lower than the sheet placement surface. A mounting table side bracket that forms a surface; and a rotating arm that is rotatably supported by the seat side bracket and constitutes the rotating shaft and is supported rotatably with respect to the mounting table side bracket. The sheet support structure according to claim 1.   The baffle plate which controls the movement from the “rear position” to the “front position” in the seated state of the seat by contacting the support piece is provided on the mounting table. Sheet support structure.

Images